:root {
            --primary-color: #1e3a8a;
            --secondary-color: #0ea5e9;
            --accent-color: #f97316;
            --dark-color: #0f172a;
            --light-color: #f8fafc;
            --text-color: #334155;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--text-color);
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--dark-color);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-section {
            background: linear-gradient(135deg, rgba(30, 58, 138, 0.9) 0%, rgba(14, 165, 233, 0.85) 100%), url('https://images.unsplash.com/photo-1551958219-acbc608c6377?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0 80px;
            position: relative;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 4px;
            background: var(--accent-color);
            border-radius: 2px;
        }
        .text-center .section-title:after {
            left: 50%;
            transform: translateX(-50%);
        }
        .card {
            border: none;
            border-radius: 12px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            overflow: hidden;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .card-icon {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: white;
            font-size: 1.8rem;
        }
        .btn-primary {
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            border: none;
            border-radius: 30px;
            padding: 12px 30px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(14, 165, 233, 0.3);
        }
        .feature-icon {
            color: var(--secondary-color);
            font-size: 2.5rem;
            margin-bottom: 15px;
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
        }
        .news-card img {
            height: 220px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .news-card:hover img {
            transform: scale(1.05);
        }
        .friendlink a.flink {
            display: inline-block;
            padding: 10px 20px;
            margin: 5px 10px;
            background-color: #f1f5f9;
            border-radius: 8px;
            color: var(--text-color);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            border: 1px solid #e2e8f0;
        }
        .friendlink a.flink:hover {
            background-color: var(--secondary-color);
            color: white;
            transform: translateY(-3px);
        }
        footer {
            background-color: var(--dark-color);
            color: #cbd5e1;
            padding-top: 60px;
        }
        footer a {
            color: #cbd5e1;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        footer a:hover {
            color: white;
        }
        .footer-bottom {
            border-top: 1px solid #334155;
            padding: 20px 0;
            margin-top: 40px;
        }
        .form-control {
            border-radius: 8px;
            padding: 12px 15px;
            border: 1px solid #cbd5e0;
        }
        .form-control:focus {
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 0.25rem rgba(14, 165, 233, 0.25);
        }
        .badge-new {
            position: absolute;
            top: 15px;
            right: 15px;
            background-color: var(--accent-color);
            color: white;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            z-index: 2;
        }
        .table-responsive {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .table th {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 15px;
        }
        .table td {
            padding: 15px;
            vertical-align: middle;
        }
        .prediction-highlight {
            background-color: rgba(14, 165, 233, 0.1);
            border-left: 4px solid var(--secondary-color);
            padding: 20px;
            border-radius: 0 8px 8px 0;
            margin: 20px 0;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0 50px;
            }
            .stats-number {
                font-size: 2.2rem;
            }
            .navbar-nav {
                text-align: center;
                padding-top: 10px;
            }
        }